Adjustable capacitance circuit and delay adjusting circuit

A technology of capacitance adjustment and capacitance circuit, which is applied to electrical components, electronic switches, and conversion equipment without intermediate conversion to AC, etc. It can solve the problems of small variable capacity ratio of adjustable capacitance circuit and limit the use range of adjustable capacitance circuit, etc. To achieve the effect of increasing the scope of use

Active Publication Date: 2022-04-15
SUZHOU RIGOL PRECISION ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large parasitic capacitance of the MOS tube, the variable capacitance ratio of the adjustable capacitor circuit is relatively small, which limits the scope of use of the adjustable capacitor circuit.

Method used

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  • Adjustable capacitance circuit and delay adjusting circuit
  • Adjustable capacitance circuit and delay adjusting circuit
  • Adjustable capacitance circuit and delay adjusting circuit

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0028] figure 1 A schematic structural diagram of an adjustable capacitance circuit provided for the prior art. like figure 1 As shown, the adjustable capacitor circuit includes three branches, and each branch is composed of two fixed capacitors and a MOS transistor to form a fully differential switched capacitor. Exemplarily, figure 1 The provided adjustable capacitance circuit includes three branches, the first branch to the third branch respectively include the first MOS transistor S1, the second MOS transis...

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Abstract

The invention discloses an adjustable capacitor circuit and a delay adjusting circuit. The adjustable capacitance circuit comprises at least one capacitance adjusting unit. The capacitance adjusting unit comprises two adjusting subunits, each adjusting subunit comprises a capacitor, a power one-way conduction tube and a loop module, the first pole of the capacitor serves as the first end of the adjusting subunit, and the second pole of the capacitor is connected with the first pole of the power one-way conduction tube and the second end of the loop module; a second pole of the electric power one-way conduction tube is connected with a control signal end and serves as a second end of the adjusting subunit, a first end of the loop module is connected with a first voltage end, and the two adjusting subunits are arranged in a mirror image mode through the control signal end; the loop module is used for providing a loop for the one-way conduction pipe. The parasitic capacitance of the one-way conduction tube is very small, so that the variable capacitance ratio of the adjustable capacitance circuit can be increased, and the adjustable capacitance circuit can be used in a high-speed circuit. And meanwhile, the application range of the adjustable capacitor circuit can be expanded.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of electronic circuits, in particular to an adjustable capacitance circuit and a delay adjustment circuit. Background technique [0002] As a basic circuit structure, the adjustable capacitance circuit can be widely used in circuits that need to change the node time constant or delay time. For example, in the delay circuit, by setting an adjustable capacitance circuit for adjusting the equivalent capacitance value of the delay circuit, the delay time of the delay circuit can be changed. [0003] In the prior art, the adjustable capacitance circuit may include an adjustable capacitance device for adjusting the capacitance value, for example, the adjustable capacitance device may be a voltage-controlled adjustable capacitance. The adjustment range of the capacitance value of the adjustable capacitor device is relatively small, which is not conducive to realizing a wide range of capac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/32H03K17/284
CPCH02M1/32H03K17/284H02M3/07
Inventor 许强严波罗浚洲王悦
Owner SUZHOU RIGOL PRECISION ELECTRIC TECH
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